Friction-clutch and governor.



PATENTED JAN. 30, 1906.

0. GHRISTIANSEN.

FRICTION CLUTCH AND'GOVERNOR.

APPLICATION FILED JULY 30,1904.

2 SHEETS-SHEET 1.

WIT/VESSES:

y ATTORNEYS No. 811,374. PATENTED JAN. 30, 1906.

' C. CHRISTIANSEN.

FRICTION CLUTCH AND GOVERNOR.

APPLICATION FILED JULY 30, 1904.

2 SHEETS-SHEET 2.

WITNESSES:

ATTORNEYS UNITED sTATEs PATENT O FICE. CARL oHRisTrANsEN, or CROOKSTON,MINNESOTA.

; FRncTnoN-cLuroi-n AND GOVERNOR.

Specification of Letters Patent.

Application filed July 30, 1904. Serial No. 218,789-

Patented J an. 30, 1906.

'proved Friction-Clutch and Governor, of

which the following is a full, clear, and exact description.

My invention relates to friction-clutches and governors, and is intendedespeciall for use in .connection with band-cutters and ceders forthreshing-machines.

The object o the invention is to produce a powerful-and sensitivefriction-clutch which will operate as a governor, serving to connect andactuate the feeder and band-cutter as. soon 'as the threshing-machinehas obtained sufiicient speed to operate efficiently.

The invention consists of novel features and parts and combinations ofthe same, Which will be described. hereinafter and then pointed out inthe claims.

. Reference is to be had to the accompanya part of this specification,in which simi ar characters of reference indicatecorresponding parts inall the device .013 'osite to that shown inFig. 1, a

line 2 2 of, Fig. 1.

substantially on the 1ine3 3 of Fi 2; and

figures.

Figurei is a side elevation of the device. Fig. 2 is a section takensubstantially on the Fig. 3 is a section taken Fig. 4 is a viewrepresenting the si e of the portion the same being broken away andshown in section.

Referring more -p articularly' to the arts, 1 represents an' axle orshaft upon Whic there this pul ey upon the shaft 1 there 1s rigidlyattached a hub 3, the same having oppositelyprojecting arms 4, near theextremit eswhereof governor-weights 5 are pivotally attached,

as shown. These weights have enlarged bodies 6 andcircumferentially-disposed rubbing-faces 7 for a purpose which willappear more fully hereinafter.

As shown, the arms 4 preferably extend substantially tangentially to thehub. The hub is preferably 'rovided with o positely-disposed faces or soulders 8, inwliich are mounted stems 9, the outer extremitieswhereofare received in the bifurcated extremities 10 of the aforesaidgovernor-weights 5, asi'ndicated. Around the stems 9 coiled springs-11are placed, and

these springs thrust against the extremities of the governor-wei hts insuch a manner as to constrain the bodies thereof inwardly, as will bereadily apparent.

Loosely mounted u on the shaft 1 and adjacent to the hub 3t ere isprovided a friction-wheel 12, which has a marginal flange 13 presentingupon its inner side a rubbing-face 14, which face lies adjacent to theaforesaid faces 7 of the governor-weights 5. Upon the outer side of theflan e 13 o positely-disposed ears 15 are provi ed, an to these earsinks 16 attach, the outer extremities thereof attaching pivotally toshoe-bars 17. These shoe-bars are preferably curved substantially asshown, so as to conform generally to the outline of the pulley 2, and ontheir outer edges they are provided with sockets 18, in

which are mounted shoes 19, the outer faces whereof are curved andnormall lie adjacent to the inner face 20 of the pul ey 2, it beingunderstood that the face 20 constitutes a rubbing-face with which theshoes .19 cooperate. The extremities of the shoe arms or bars 17 arepivotally attached at 21 to radially-pro'ectingarms 22, which attach toa second ub 23, loosely mounted upon the shaft 1 adjacent to thefriction-wheel 12, as indicated most clearly in Fig. 2. This hub 23 hasintegral therewith a sprocket-wheel 24 or similar means for transmittingthe rotary movement of the hub. It should be understood that this wheel24 would be connected in some manner withthe band-cutter or feeder.

Upon the face of the friction-wheel. 12 a pair of op ositely-disposedstops 25 are ormed, an these stops are adapted to abut, against theextremities of elongated sockets 26, whch constitute parts of theaforesaid hub 23', and which receive the arms 22, as shown. The sockets26 are normally maintained against the stops 25 b means of coiledsprings ,27, which lie aroun stems 28 which are pivoted at 29 to thesides of the sockets, the extremities of the said stems assingloosely-through cars 30, formed upon t e face of the friction-pulley,as, indicated most clearly-inFigB. a

In order to effect a desirable adjustment of the shoes 19 with respectto the rim of the pulley 2, .the links 16 are preferably made in parts.16 and 16", the former of which constitute threaded sockets receivingthe extremities of the latter, as indicated.

In the operation of the-device it should be roq understood that thepulley 2 will be rotated by a belt or similar means moving with thethreshing-cylinder. When the threshing machinery shall have acquired asufficient ve locity of rotation, the centrifugal force will operateupon the bodies 6 of the weights 5 in 'such a manner as to throw thesame outwardly in a well-understood manner, projecting theirrubbing-faces 7 against the inner face of the friction-wheel 12, therotation being in the direction of the arrows shown in Figs. 3 and 4. Inthis way a firm frictional engagement is made between the weights 5 andthe wheel 12, and this should become sufficient to ad- Vance the wheel12 with the rotating hub.3 and the shaft 1. observed that the links 16pass toward the wheel 12 in an inclined direction and in such a Way thatwhen the pulley is rotated in the direction indicated the pivotal pointsof attachment of the links 16 with the ears move outwardly with respectto the pivots 21. In this manner they project the free extremities ofthe shoe-bars 17 outwardly toward the rim or rubbing-face 20 of thepulley 2. If moved sufficiently, the shoes 19 will come in contact withthe rim of the pulley 2 and bring about a firm frictional engagementtherewith From this arrangement and mode of operation it should beunderstood that the device constitutes a clutch, and when the parts arein frictional engagement, as described, the arms 22 will rotate with theshoe-bars and operate, of course, to rotate with them the hub 23, towhich they are attached, and this hub, it will be observed, is integralwith the wheel 24, which actuates theband-cutter or feeder mechanism.

It should be observed that the connection between the wheel 12 and theshoes 17 is substantially a toggle joint or connection, so

that a slight frlctional force exerted at the all situations whereclutches of this general rubbing-faces 7 will support a veryconsiderable force in the links 16. The force exerted in the links 16applies itself very advantageously to the broad inner rubbing-surface 20of the pulley 2. For this reason evidently the friction-clutch andgovernor should be very efficient, sensitive, and powerful. The

springs 27, like the springs 9, operate normally to maintainthe shoes 19out of contact with the rubbing-faces with which they coo erate;

VBhile the device is intended especially for use-in the connectionsuggested, evidently the clutch-should have a wide usefulness incharacter are now employed.

In a certain aspect t e inner ortion of the clutch described may beconsi eredas itself constituting a clutch and likewise with res ect tothe outer portion of the clutch. Ta g this view,the entire deviceconsists of an inner clutch, which when applied operates to At thispoint it should be apply a second or outer clutch, both the clutchesbeing under the control of the governing means for the inner clutch.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 7 1. In a device of the class described, incombination, a shaft, a member rigid therewith governor-weights carriedby said mem her, a friction-clutch controlled by said governor-weights,a pulley, shoes cooperating therewith, and a connection between saidshoes and said clutch.

2. In a device of the class described, in combination, a shaft, a pulleycarried rigidly thereby, a friction-wheel carried loosely and a hubcarried rigidly by said shaft, governor- Weights carried by said hub,and cooperating with said friction-wheel,to constitute a clutch, shoesmounted adjacent to said pulley, and links connecting the shoes withsaid wheel.

3. In a device of the class described, in combination, a shaft, a loosewheel carried thereby, a tight pulley carried thereby, governor-weightsrotating with said shaft and having rubbing-faces which may engage saidloose wheel, shoes cooperating with said tight ulley, links connectingsaid shoes with said oose wheel, and affording means for transmittingthe rotation of said shoes.

4. In a device of the class described, in combination, a shaft, a tightpulley carried thereby, a loose wheel carried thereby, aspeed-controlled clutch member cooperating with said loose wheel,shoe-bars,-shoes carried thereby rubbing the face of said tight pulley,links connecting the said shoe-bars with said loose wheel, and a hubloose upon said shaft and having projecting arms to which said shoe-barsattach.

5. In a device of the class described, combination, a shaft, a tightulley carried thereby, a loose wheel carried t ereby, a loose hubcarried by said shaft, adjacent to said loose wheel, stops for limitingthe rotation of said hub with respect to said loose wheel,

springs normally restraining said hub into an extreme position withrespect to said loose wheel, shoe-bars attached to said hub and havingshoes rubbing against said tight pulley, means for connecting saidshoe-bars with said loose wheel, and s eed-controlled mechanism forrotating sai loose wheel.

6. In a device of the class described, in combination, a shaft, a tightulley carried thereby, a loose' wheel carried t ereby, a loose hubcarried by said shaft adjacent to said loose wheel, said loose wheelhaving projections constituting stops therefor, springs normallyrestraining said hub to engage said stops, said hub comprisingoppositely-disposed sockets, arms attached 111 said sockets,

shoe-bars attached to said arms and having shoes ada ted to rub the faceof said tight pulley, lin connecting said shoe-bars with s ne-2e a saidloose wheel, and s eed-controlled mechthe face of said tight pulley,links eonnectin anism for rotating sai loose wheel. said shoe-bars withsaid loose wheel, an

7 In a device of the class described, springs connecting said loose hubwith said combination, :1; shaft, a tight ulle carried loose wheel. 15 5thereb aloose wheel carried there]? ahub In testimony-whereof I havesigned my carrie rigidly by said shaft, governonarms name to thisspecification in the presence of fiivotally carried by said hub andhaving rubtwo subscribing witnesses.

ing-faces adapted to engage said loose wheel, CARL CHRISTENSEN. a loosehub carried by sai shaft, projecting Witnesses: I I10 arms attachedthereto, shoe-bars attached to J. W. WHEELER,

said arms and having shoes adapted to rub a 0. M. Phases.

